Shape of the Wiitigo is a rare Enchantment — Aura card from Coldsnap (CSP), collector number 120. Current market price: $0.34 (foil $2.16), TCGplayer market prices via Scryfall.
Enchant creature When this Aura enters, put six +1/+1 counters on enchanted creature. At the beginning of your upkeep, put a +1/+1 counter on enchanted creature if it attacked or blocked since your last upkeep. Otherwise, remove a +1/+1 counter from it.